Short answer: the Triangle Borea BR03, since the Diamond 9.1 you can buy today is not the original design, though neither ranks well in its class. The BR03’s bass is genuinely decent for the price, measuring F3 57Hz and F10 42Hz with no real complaints from the reviewer, though it has a noticeable mid-range suckout most pronounced in the upper midrange and lower treble. The Diamond 9.1’s first design was pretty good, but every current new one is the crap version. Both are rated below 3.0/5 among the 134 bookshelf speakers; for better sound, the Perlisten S4b ranks #2 at $8,000.
Buy the Triangle Borea BR03, since the Wharfedale Diamond 9.1 is discontinued and only worth hunting down used.
Looking for alternatives? See the complete Passive Home rankings.
Specifications Side By Side
| Wharfedale Diamond 9.1 | Triangle Borea BR03 | |
|---|---|---|
| Price | Discontinued | $398.00 per pair |
| Ranked | #112 of 134 in Large Size Bookshelf Speakers | #113 of 134 in Large Size Bookshelf Speakers |
| Impedance | 6 ohms | 8 ohms nominal (manufacturer spec), 4.2 ohms minimum (measured, Erin’s Audio Corner) |
| Sensitivity | 87dB | 87.5dB (measured at 2.83V/1m, Erin’s Audio Corner) |
| Drivers | 6.5” Kevlar cone woofer, 1” soft dome tweeter | 6.5” natural cellulose midwoofer, 1” (25mm) EFS silk dome tweeter |
| Weight | 12.1 lbs (5.5 kg) (good version), 9.9 lbs (4.5 kg) (bad version) each | 13.2 lbs (6 kg) each |
| Woofer Cabinet | ported | ported, dual front ports |
| Dimensions | 11.7”H x 7.6”W x 10.9”D (296.0 x 194.0 x 278.0 mm) | 14.96”H x 8.11”W x 12.36”D |
| Bass Extension (-3dB) | 40Hz (measured, Hi-Fi World) | 57Hz (measured, Erin’s Audio Corner) |
| DIY Kit | No | No |
| Crossover Frequency | - | 3600Hz |
| Bass Extension (-10dB) | - | 42Hz (measured, Erin’s Audio Corner) |
| Recommended Power | - | 100W |
| Spinorama Preference Score | - | 4.03 |
| Spinorama Preference Score with Perfect Sub | - | 6.38 |
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Prices on this page were last checked October 2, 2026 at 10:18 PM UTC. Product prices and availability are accurate as of that date/time and are subject to change; the price and availability shown on Amazon at the time of purchase will apply to the purchase of this product.
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The Two Speakers In Full
Wharfedale Diamond 9.1 Discontinued eBay
Newer model: the Wharfedale Diamond 12.1i. It’s likely to perform similarly, though we don’t have measurements to confirm that yet.
Pros: The first design was a pretty good sounding speaker, the speaker was then outsourced to China and lost 1.5kg and was made with cheap parts and sounds much worse. Slightly rolled off in the treble by about 3dB. Measured bass extension of 40Hz (-3dB).
Cons: All current new ones sold today are the crap version. Discontinued.
Full Wharfedale Diamond 9.1 review and specifications →
| Bass Extension (-3dB) | 40Hz (measured, Hi-Fi World) |
|---|---|
| DIY Kit | No |
| Dimensions | 11.7”H x 7.6”W x 10.9”D (296.0 x 194.0 x 278.0 mm) |
| Drivers | 6.5” Kevlar cone woofer, 1” soft dome tweeter |
| Impedance | 6 ohms |
| Sensitivity | 87dB |
| Weight | 12.1 lbs (5.5 kg) (good version), 9.9 lbs (4.5 kg) (bad version) each |
| Woofer Cabinet | ported |
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Wharfedale Diamond 9.1 vs Klipsch RP-600M
- Wharfedale Diamond 9.1 vs Sonus Faber Lumina II Amator
- Wharfedale Diamond 9.1 vs B&W 805S
- Wharfedale Diamond 9.1 vs KEF Q350
- Wharfedale Diamond 9.1 vs Aperion Audio Verus V8B
- Wharfedale Diamond 9.1 vs Emotiva Airmotiv B2+
- Wharfedale Diamond 9.1 vs Triad In-Room Gold LCR
- Wharfedale Diamond 9.1 vs Sonus Faber Sonetto II G2
- See all 25 comparisons
Triangle Borea BR03: $398.00 per pair Amazon eBay
Pros: Bass output is genuinely decent for the price: measured extension reaches F3 57Hz/F10 42Hz, which the reviewer had no real complaints about. Dual front-firing ports and a well-stuffed, well-braced cabinet. Solid build quality overall. Measured bass extension of 57Hz (-3dB), with a measured sensitivity of 87.5dB.
Cons: A noticeable mid-range suckout, most pronounced in the upper mid-range/lower treble, that the reviewer attributes to cabinet resonances and driver breakup rather than a deliberate voicing choice: it makes vocals and instruments sound recessed and thin rather than warm. Sibilance in the 4-8kHz region shows up on every track the reviewer tried. Measured minimum impedance dips to about 4.2 ohms (with an even lower EPDR), despite the speaker and its own rear panel being labeled 8 ohms: worth knowing if you’re planning to drive these with a receiver/AVR that assumes an 8-ohm nominal load. The reviewer is upfront that this speaker has a devoted following among other reviewers, but says he specifically doesn’t hear what they hear and wants people who own it to trust their own ears rather than assume something’s wrong with their hearing if they don’t love it either.
Full Triangle Borea BR03 review and specifications →
| Bass Extension (-10dB) | 42Hz (measured, Erin’s Audio Corner) |
|---|---|
| Bass Extension (-3dB) | 57Hz (measured, Erin’s Audio Corner) |
| Crossover Frequency | 3600Hz |
| DIY Kit | No |
| Dimensions | 14.96”H x 8.11”W x 12.36”D |
| Drivers | 6.5” natural cellulose midwoofer, 1” (25mm) EFS silk dome tweeter |
| Impedance | 8 ohms nominal (manufacturer spec), 4.2 ohms minimum (measured, Erin’s Audio Corner) |
| Recommended Power | 100W |
| Sensitivity | 87.5dB (measured at 2.83V/1m, Erin’s Audio Corner) |
| Spinorama Preference Score | 4.03 |
| Spinorama Preference Score with Perfect Sub | 6.38 |
| Weight | 13.2 lbs (6 kg) each |
| Woofer Cabinet | ported, dual front ports |
- Links
- Reviews, Comparisons and Sound Samples
- Head-to-Head Comparisons
- Triangle Borea BR03 vs B&W 805S
- Triangle Borea BR03 vs Klipsch RP-600M
- Triangle Borea BR03 vs Sonus Faber Lumina II Amator
- Triangle Borea BR03 vs Aperion Audio Verus V8B
- Triangle Borea BR03 vs KEF Q350
- Triangle Borea BR03 vs Emotiva Airmotiv B2+
- Triangle Borea BR03 vs Sonus Faber Sonetto II G2
- Triangle Borea BR03 vs ATC SCM19
- See all 51 comparisons